"Dydd Gwener dw i'n mynd i Aberdaron."
Translation:On Friday, I'm going to Aberdaron.
Wouldn't 'On Friday I'm going to Aberdaron' sound as a more natural translation than 'Friday I'm going to Aberdaron'? Additionally the emphatic structure might be a bit confusing to English speakers outside of Wales. I imagine for most of us the more natural translation would be 'I am going to Aberdaron on Friday'
The highest statistical probability in English would be ' I am going to Aberdaron on Friday'. But in Welsh the verb usually comes first unless something else is being emphasized so we can presume Friday (not Thursday or Wednesday) is implied. ' Friday I'm going to Aberdaron ' might do although 'On Friday' gives the needed emphasis, doesn't it?